bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/ConnectionRelationRemover.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.adapters;
  13
  14 import java.util.Collection;
  15 import java.util.Map;
  16
  17 import org.simantics.db.ReadGraph;
  18 import org.simantics.db.Resource;
  19 import org.simantics.db.WriteGraph;
  20 import org.simantics.db.common.utils.OrderedSetUtils;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.db.layer0.adapter.impl.AbstractRemover;
  23 import org.simantics.db.layer0.util.RemoverUtil;
  24 import org.simantics.diagram.stubs.DiagramResource;
  25 import org.simantics.layer0.Layer0;
  26 import org.simantics.modeling.ModelingResources;
  27 import org.simantics.modeling.utils.RemoverUtils;
  28 import org.simantics.modeling.utils.RemoverUtils.ValidationResult;
  29
  30 /**
  31  * @author Tuukka Lehtonen
  32  * @see TerminalRemover
  33  */
  34 public class ConnectionRelationRemover extends AbstractRemover {
  35
  36     public ConnectionRelationRemover(Resource connectionRelation) {
  37         super(connectionRelation);
  38     }
  39
  40     @Override
  41     public String canRemove(ReadGraph graph, Map<Object, Object> aux) throws DatabaseException {
  42         ModelingResources MOD = ModelingResources.getInstance(graph);
  43         Resource diagramConnectionRelation = null;
  44         Resource connectionRelation = graph.getPossibleObject(resource, MOD.DiagramConnectionRelationToConnectionRelation);
  45         if (connectionRelation != null)
  46             diagramConnectionRelation = resource;
  47         else
  48             connectionRelation = resource;
  49         ValidationResult result = RemoverUtils.validateConnectionRelationRemoval(graph, connectionRelation, diagramConnectionRelation);
  50         if (result.inUse())
  51             return RemoverUtils.formatError(graph, result);
  52         return null;
  53     }
  54
  55     @Override
  56     public void remove(WriteGraph graph) throws DatabaseException {
  57         Layer0 L0 = Layer0.getInstance(graph);
  58         DiagramResource DIA = DiagramResource.getInstance(graph);
  59         ModelingResources MOD = ModelingResources.getInstance(graph);
  60
  61         Collection<Resource> lifts = graph.getObjects(resource, DIA.Lifts);
  62
  63         // Not necessary, this is legacy support only.
  64         for (Resource def : graph.getObjects(resource, L0.ConcernsRelation_Inverse))
  65             graph.deny(def);
  66
  67         // Remove possible symbol terminal(s).
  68         for (Resource diagramConnectionRelation : graph.getObjects(resource, MOD.ConnectionRelationToDiagramConnectionRelation)) {
  69             removeTerminals(graph, DIA, diagramConnectionRelation);
  70             Resource diagramConnectionRelationInverse = graph.getPossibleObject(diagramConnectionRelation, L0.InverseOf);
  71             graph.deny(diagramConnectionRelation);
  72             if (diagramConnectionRelationInverse != null)
  73                 graph.deny(diagramConnectionRelationInverse);
  74         }
  75         removeTerminals(graph, DIA, resource);
  76
  77         Resource connectionRelationInverse = graph.getPossibleObject(resource, L0.InverseOf);
  78         graph.deny(resource);
  79         if (connectionRelationInverse != null)
  80             graph.deny(connectionRelationInverse);
  81
  82         if (!lifts.isEmpty())
  83             for (Resource lift : lifts)
  84                 RemoverUtil.remove(graph, lift);
  85     }
  86
  87     private void removeTerminals(WriteGraph graph, DiagramResource DIA, Resource diagramConnectionRelation) throws DatabaseException {
  88         for (Resource terminal : graph.getObjects(diagramConnectionRelation, DIA.HasConnectionPoint_Inverse)) {
  89             for (Resource ownerList : OrderedSetUtils.getOwnerLists(graph, terminal, DIA.Composite)) {
  90                 OrderedSetUtils.remove(graph, ownerList, terminal);
  91             }
  92             RemoverUtil.remove(graph, terminal);
  93         }
  94     }
  95
  96 }